What the public needs to understand is that kettling people who object to government policy is a very complex operation requiring skills far beyond those the Met can muster. Inevitably, some sad git is going to get killed, but he died for the cause of the global establishment that pays the Met's wages and it was well worth it. At least, it wasn't a police officer who died.

Other methods would have required selectivity and discretion, in recruitment as much as in targeting, all of which is expensive and the protestors would have objected to the cost.